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Predictions For EV Therapy In Alzheimer's Disease Based on Four-Loop Consciousness & Vascular-First Framework
No full textBackground and Problem
Alzheimer's disease represents one of the most significant unsolved problems in medicine. Despite decades of research and billions in investment, over 99% of clinical trials have failed to produce disease-modifying treatments. The approval of lecanemab and donanemab in 2023 and 2024 marked the first confirmed reductions in amyloid plaque burden in clinical populations, yet the cognitive benefits observed were modest, averaging approximately 1.3 to 1.7 points on the ADAS-Cog scale over 18 months, a magnitude that raises serious questions about whether amyloid removal addresses the primary drivers of cognitive decline. These results, while statistically significant, suggest that the dominant theoretical framework guiding AD drug development for three decades may be targeting a downstream phenomenon rather than the upstream mechanisms responsible for progressive loss of consciousness loop function.
This registration presents theory-based predictions derived from the Four-Loop Consciousness and Vascular-First Framework, a theoretical model that proposes consciousness emerges from synchronized activity across four specific neural loops: the ACC-thalamic error detection loop, the VTA dopaminergic prediction error loop, the central lateral thalamic-cortical integration loop, and the Layer 5 pyramidal recurrent processing loop. The framework proposes that Alzheimer's disease and related dementias represent the progressive failure of these loops through a vascular-first, two-hit mechanism in which cerebral hypoperfusion creates chronic mild acidosis that enables ASIC1a-mediated calcium influx, driving tau phosphorylation through a PP2A-GSK3β cascade. Under this model, amyloid accumulation is downstream of this cascade rather than its cause, explaining why anti-amyloid therapies produce amyloid clearance without proportional cognitive recovery.
The Extracellular Vesicle Connection
Extracellular vesicles have emerged as a therapeutic modality uniquely suited to testing the predictions of this framework. Unlike single-mechanism interventions, EVs simultaneously deliver cargo that modulates multiple biological processes including tau phosphorylation, neuroinflammation, BBB integrity, and neurogenesis. A systematic review of 89 EV studies published in 2025 concluded that multimodal treatments addressing toxic protein deposits, neuroinflammation, and BBB permeability simultaneously are necessary for meaningful cognitive benefit, a conclusion that precisely matches the framework's central prediction that single-mechanism interventions targeting any one loop are insufficient for consciousness restoration. This independent convergence between EV research findings and framework predictions motivated the selection of EV therapy as the primary test case for theory validation.
Human EV clinical trials have demonstrated that EVs from healthy donors safely cross the blood-brain barrier, incorporate into neurons and glia, and simultaneously modulate tau phosphorylation, inflammation, vascular integrity, and neuronal function. Phase 3 trials are underway and Phase 2 results are beginning to accumulate, making the 2026 to 2030 window a critical period for theory-based prediction evaluation.
Purpose of This Registration
The purpose of this registration is to publicly record specific, falsifiable, directional predictions derived from the Four-Loop Consciousness and Vascular-First Framework before the relevant evidence exists, in order to provide a timestamped record that allows independent evaluation of the framework's predictive power as EV clinical trial and mechanistic study data accumulate between 2026 and 2030.
This registration serves three distinct scientific functions.
First, it establishes priority for predictions that are uniquely derivable from the framework and could not be generated from general AD knowledge or the existing EV literature alone. Second, it provides a structured falsifiability record: the framework is not merely claimed to explain existing data retrospectively but is held to a prospective standard in which disconfirmed predictions constitute genuine evidence against the framework's core theoretical positions. Third, it contributes to the broader practice of open science in theoretical neuroscience and translational medicine by demonstrating that consciousness theories can generate specific, measurable, clinically relevant predictions rather than remaining at the level of philosophical conjecture.
The Six Predictions
Six predictions are registered, selected from a larger set of framework-derived predictions on the basis of three criteria: they are uniquely derivable from this framework and cannot be predicted from general AD knowledge alone, they are falsifiable within the 2026 to 2030 evaluation window given the expected trajectory of EV research, and they collectively test the framework's core theoretical positions rather than peripheral implications.
The first two predictions are mechanistic and test the framework's central claim that EV therapeutic effects are mediated through the PP2A-GSK3β-tau cascade. Prediction 1 uses an okadaic acid occlusion design to establish the causal chain from EV treatment through PP2A activation to GSK3β inhibition. Prediction 2 tests whether the tau dephosphorylation produced by EV treatment matches the substrate specificity profile of PP2A specifically rather than reflecting global phosphatase activation or tau degradation.
The next two predictions are clinical and test the framework's vascular-first hypothesis against the amyloid hypothesis in human populations. Prediction 3 tests whether patient response to EV therapy is predicted by vascular and tau burden rather than amyloid burden, with pure amyloid patients predicted to show minimal benefit and vascular-tau patients predicted to show meaningful cognitive improvement. Prediction 4 tests the most direct falsification of the amyloid hypothesis available in the EV context: whether cognitive improvement from EV therapy can occur without proportional amyloid clearance, establishing a dissociation between cognitive benefit and amyloid reduction that the amyloid hypothesis cannot easily accommodate.
The fifth prediction tests the framework's claim about amyloid's epiphenomenal status in a combination therapy context, predicting that adding anti-amyloid antibodies to EV therapy produces no cognitive synergy while significantly increasing ARIA risk, directly opposing the field's current movement toward combination strategies.
The sixth prediction is the most novel and uniquely framework-derived: that EV treatment produces opposite directions of ACC cerebral blood flow change in early MCI versus late AD patients, with early patients showing decreased perfusion toward normal range and late patients showing increased perfusion, yet both groups showing cognitive improvement. This prediction follows from the framework's biphasic compensation-decompensation model and cannot be derived from any existing vascular or amyloid theory of AD.
Expected Outcomes and Significance
If the predictions are confirmed, the results would provide prospective evidence that the Four-Loop Consciousness and Vascular-First Framework has genuine predictive power in the domain of EV therapeutics and AD pathophysiology, lending support to the framework's core propositions that consciousness loop function is the critical therapeutic target, that the PP2A-GSK3β cascade is the primary molecular mechanism underlying loop degradation, and that amyloid accumulation is a downstream consequence of this cascade rather than its cause.
Confirmation of Prediction 4 specifically, in which cognitive improvement occurs without proportional amyloid reduction, would constitute one of the most significant findings in AD research of the past three decades, directly challenging the theoretical foundation on which the majority of AD drug development has been built and providing prospective evidence for the framework's vascular-first alternative.
Confirmation of Prediction 6 would establish the compensation-decompensation model as a necessary framework for interpreting cerebrovascular responses to therapy in AD and would require a fundamental reorientation of how vascular outcomes are interpreted in trials, with implications extending well beyond EV therapy to any intervention affecting cerebral perfusion in AD populations.
If the predictions are disconfirmed, this registration provides a clear and honest record of which specific claims were wrong and in what direction, contributing to the iterative refinement of the theoretical model and providing the field with information about which aspects of the vascular-first framework require revision. Disconfirmation of Prediction 2 (global rather than selective tau dephosphorylation) would suggest that EV effects on tau are mediated through multiple phosphatases rather than PP2A specifically, requiring revision of the cascade model. Disconfirmation of Prediction 4 (amyloid reduction required for cognitive benefit) would require serious reconsideration of the framework's position on amyloid's causal role.
The registration is intended to be evaluated against the standard of whether the framework predicts outcomes that the amyloid hypothesis and general EV literature knowledge cannot predict, and whether those predictions prove accurate when the relevant data emerge. The timestamped public record provided by this OSF registration ensures that the evaluation is prospective, transparent, and independent of the framework's developers
Providing Feedback While Grading: A Harmonized Approach
No full textThis repository contains the de-identified data, analysis code, and codebook for "PROVIDING FEEDBACK WHILE GRADING: A HARMONIZED APPROACH."
The study introduces a dual-rubric assessment methodology designed to support high-information feedback and fair, efficient grading of semi-structured assignments. Two complementary studies evaluate the methodology: Study 1 examines the student perspective on feedback quality, fairness, and self-reported learning (N = 346); Study 2 examines grading consistency and evaluation time among teaching assistants (N = 6; 120 ratings). A peer evaluation robustness check (n = 144 raters) is reported in Appendix E.
Ethics approval: ETH2223-0084
RELATE Exudates Meta-Analysis
No full textDataset on root exudation from wetland plants.
Belongs to following publication:
Title: Root exudate profiles of wetland plants - a quantitative synthesis of secretion rates
Journal: Rhizosphere
Authors: Namid Krüger et al
Psychometric Validation of a Deep Learning-based Foreground Speech Detection Algorithm for Everyday Conversation Detection
No full textThe effect of third-party joint attention on object encoding in dogs
No full textDogs are sensitive to ostensive cues, especially when directed at them. However, it remains unclear whether dogs also use observed third-party communicative interactions between humans to influence how they process object-related information. In human infants, simply observing two people establishing joint attention to an object improves the encoding of identity-specific object features. Here, we aim to investigate whether dogs exhibit a similar effect. To do this, we will test whether observing two humans engage in joint attention, compared to no joint attention, affects how dogs encode and remember the identity and location of objects
Estratégias de prevenção da Síndrome da Visão por Computador em estudantes universitários durante a pandemia de COVID-19: um protocolo de revisão de escopo
No full textObjetivo: Mapear as estratégias de prevenção e manejo da Síndrome da Visão por Computador (SVC) em estudantes universitários no contexto da pandemia de COVID-19 (2020–2025).
Introdução: A transição massiva para o ensino remoto durante a pandemia exacerbou a incidência de sintomas oculares e extraoculares em universitários. Esta revisão visa sistematizar as evidências disponíveis sobre intervenções ergonômicas, ópticas e ambientais implementadas para esta população específica.
Critérios de Inclusão: Serão incluídos estudos que envolvam estudantes universitários (População), abordem estratégias de prevenção da SVC (Conceito) e tenham sido publicados a partir de 2020, no contexto da pandemia e pós-pandemia (Contexto). Serão considerados estudos quantitativos, qualitativos e mistos, nos idiomas inglês e português.
Métodos: O protocolo segue as diretrizes metodológicas do JBI e o checklist PRISMA-ScR. As buscas serão realizadas nas bases PubMed, Scielo, Cochrane Library, BVS, LILACS, Web of Science, Scopus, Google Scholar e Epistemonikos.
A seleção dos estudos e a extração dos dados serão conduzidas por dois revisores independentes, com as divergências resolvidas por um terceiro revisor
Peer Recognition and Math Identity Development: A Longitudinal Network Perspective
No full textBase R script for the project detailed below.
Abstract of Project:
Student math identities (i.e., whether they see themselves as “math people”) shape their engagement and motivation in math. Peer recognition is known to play a central role in math identity development, yet little is known about how actual recognition patterns among peers co-develop with math identity during early adolescence, and whether gendered effects are present at this stage of development. Using stochastic actor-oriented models (SAOM) and meta-analysis, this study examined reciprocal associations between peer recognition networks and math identity across one semester in 14 Turkish middle school math classrooms (N = 458 students). Results showed clear bidirectional associations: students who received more peer recognition at earlier waves tended to report higher math identities later, and students with higher math identities at earlier waves were more likely to receive subsequent peer recognition. Positive quadratic shape effects suggested reinforcement processes that kept already high and low identities stable. No sex-related differences emerged in math identity, receiving peer recognition, or in the effect of receiving peer recognition on math identity. These findings demonstrate that peer recognition meaningfully contributes to math identity development in early adolescence, but that gendered differences documented in older students may not be present yet
Gut Microbiota and Its Relationship with Inflammation in Young Adults Who Engage in Physical Exercise: A Scoping Review
No full textThe gut microbiota acts as a modulator of various physiological processes, particularly highlighting its role in the regulation of the immune system and the inflammatory response. In young adult populations, the presence of a low-grade inflammatory state is influenced by lifestyle factors, among which the practice of physical exercise plays a relevant role.
Recent scientific evidence suggests that physical exercise, both aerobic and resistance modalities, has the capacity to induce changes in the composition and diversity of the gut microbiota. Such variations may, in turn, be associated with modifications in the levels of systemic inflammatory markers.
In light of this context, it is timely to conduct a scoping review aimed at identifying and synthesizing current findings on this topic. The objective of this study is to map the available scientific literature regarding the relationship between physical exercise and inflammation in young adults. This review will be conducted using the Joanna Briggs Institute (JBI) methodology, grounded in the PIO framework (Population, Intervention, and Outcomes), and following the PRISMA-ScR guidelines
